![]() ![]() If you do a read or write larger than one sector to /dev/rdisk, that request will be passed straight through. Those devices are closer to the physical disk than the buffered cache ones. dev/rdisk – “raw” in the BSD sense and force block-aligned I/O. dev/disk – buffered access, for kernel filesystem calls, broken in 4kb chunks. On MacOS you should always use /dev/rdisk device. FIO is a popular tool for measuring IOPS on a Linux servers.ĭo not make mistake of benchmarking (or using dd for eg.) /dev/disk device. In Ubuntu/Debian/RHEL land I’ve benchmarked device IO before and had good experience with FIO. BLACKMAGIC DISK SPEED TEST WITH APPLE STORE MACOn MacOS however, Blackmagic Disk Speed Test in Mac App Store did not inspire confidence in me (blac kmagic, cmon?), not did 11yrs old Xbench or jDiskMark beta (written in Java). BLACKMAGIC DISK SPEED TEST WITH APPLE STORE WINDOWSOn Windows I used hdtune for ages and was happy with it. :)Īfter fitting disks in enclosures, first issue I stumbled upon was a lack of disk benchmarking tool on MacOS. The one with higher price had to be better. Sceptical that I am, I bought both and decided to do a test and prove her that she is wrong. Good lady at the counter suggested that instead of 15EUR one, I get 13EUR noname enclosure since “it was better”. I visited my local hardware store to get USB3 2.5″ HDD enclosure, being geek, I did my homework and decided to get noname enclosure for 15 EUR with semi rubber protection. I wanted to see how will SSD disk act in same conditions. 99% of them broke or started showing serious problems just after 1st year of usage (traveling with them with the notebook). I have a really BAD track record of broken non-ssd 2.5″ travelling external disks. The other day, I noticed two Kingston SSDNow V200 128GB SSD’s just sitting there doing nothing, so I decided to make them usable again. Here’s some Thunderbolt connections (thanks to friends on Twitter) visualized with the Blackmagic Disk Speed Test.Over time and numerous hardware updates around the office, I collected a vast number of 2.5″ HDD’s in my “hardware junk” box. I had one in the Editblog labs for testing and they are fast. The Promise Pegasus line seems to be the Thunderbolt RAID of choice. But it’s Thunderbolt that provides speed and simplicity as Thunderbolt is the connection of the future for the Macintosh. The next real step up in speed comes from a heavy duty RAID often connected via an internal card in a MacPro like a Cal-Digit HDElement. ![]() It's not redundant but it does provide decent speed. This is two internal drives in my MacPro striped into a two-drive RAID with the Mac OS. That's right G-Tech we're talking about you. USB is slow and should really be a last resort for video editing.įirewire 800 is faster than USB and many editors (somehow) make do with Firewire drives but if you can get more speed then go for it.Ī cheap internal eSATA card in a MacPro can get a bump in speed over Firewire 800 but unfortunately some drive vendors are removing eSata from their drives. Give that excellent resource a read and then compare that to the speedometers below. To help understand all these video data rates that are so often talked about this article from Larry Jordan will help. I told them to watch this space as seeing those speeds and how much faster a good media drive is can help understand why you want and need a fast drive for editing.įor those new to editing, don't worry so much about what all these numbers mean just know the faster the better. We discussed data rates and connectors and everything else but one thing we didn’t have was the Blackmagic Disk Speed Test to help visualize that speed with its big write and read speedometers. Unfortunately we did see some of that in action as trying to use USB drives for editing were causing some problems. The last thing you want when editing video is to be bottlenecked by show hard drive speeds. The Blackmagic Disk Speed Test ( Mac App Store link) is a good way to visualize drive speed but we didn’t have that handy so here’s those big speedometers scaling from USB up to a very fast Thunderbolt connection. All the discussion of data rates and different types of connections can only go so far as students new to editing need to see that speed in action. ![]() I was having a discussion with some students recently about hard drive speeds and why it’s important to have a fast drive for editing. ![]()
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